Hi all, here the details of my latest algae fight:
Have been keeping pool balanced all year
FC between 3.5-4.5
Ph stable at 7.5
TA stable at 50
CYA had dropped to 30 ish due to lots of rain, evaporation and consequent replenishing with city water
Last week was very hot ie upper 90 s all week
I added Liquid CYA to bring CYA to 60 This was no more than two days before the algae showed up
Yesterday, I brought FC to 12 (forgot to lower Ph first) Also added some cellulose fiber aid to help clearing process, pressure never did rise!
Did OCLT last night, went from 12 dwn to 9 overnight (it did rain a little during the night)
I added 9 more gallons of bleach this morning to get to algae shock level of 36…brushed again, Re-checked FC after 3 hours, and the test is not behaving right.
When I added the powder to the vile, it only turned a light shade of red but I continued by adding drops and as I did, the water turned dark red. After 64 drops, the water turned to a slightly yellowish tint but would never get clear even after adding 15 more drops.
Ph is off the chart now, TA is 60, not sure what the FC is due to discolored water instead of clear
Lowered Ph to 7.2, then added 3 gallons of bleach to get to shock level, brushed again. Water is much more clear already but I am concerned about this light yellowish tint to the water in the vial at the end of the drop count. (FYI, the water is clear in the vial when beginning the FC test
Anyone know what this light yellowish tint might be? And do you think the FC test is valid at the point the red is gone, just not clear water